3" Fig 100 Butt Weld (Sch 40) Hammer Union – Low-Pressure Flowline Fitting

The 3" Figure 100 Butt Weld Schedule 40 Hammer Union is a durable, general-purpose flow control assembly engineered for permanent, highly reliable low-pressure fluid routing across upstream, midstream, and industrial applications. Rated for a 1,000 PSI Cold Working Pressure (CWP), this robust hammer union provides a fast-makeup, secure connection between welded 3-inch piping systems, making it highly effective for large-scale rig utility lines, high-volume water transfer, bulk storage networks, and general low-pressure manifold configurations.

Unlike traditional threaded unions, this Figure 100 assembly features precision-machined Butt Weld ends explicitly designed to match standard Schedule 40 pipe dimensions. This design allows for a permanent, full-penetration welded integration into pipework, effectively eliminating the risk of thread-related leaks, galling, or loosening caused by continuous line vibration. The union utilizes a precision-machined metal-to-metal seating surface between the male and female subs, ensuring dependable pressure containment without the need for secondary elastomeric seals, thus simplifying field maintenance and extending the operational lifespan of the permanent piping setup.

Manufactured from high-strength industrial-grade forged steel, the 3" Fig 100 Hammer Union delivers structural resilience and cost-effectiveness. The heavy-duty wing nut allows for rapid, tool-free assembly and dismantling of the welded spools in the field, critically reducing maintenance and rig-up times for large-bore utility flowlines.

Features & Benefits

• 1,000 PSI Pressure Rating: Engineered to safely manage continuous fluid transfer in standard low-pressure systems with a 1,000 PSI Cold Working Pressure (CWP) rating.

• Butt Weld Connection (Sch 40): Precision-beveled ends designed for standard Schedule 40 pipe allow for permanent, high-integrity welded connections, providing superior resistance to vibration.

• Metal-to-Metal Sealing: Features a precision-machined conical and spherical seating design that provides a tight, reliable seal without the need for secondary elastomer rings, lowering maintenance demands.

• Rugged Construction: Built from industrial-grade forged steel to withstand general mechanical field handling, harsh weather conditions, and permanent installation stresses.

• Rapid Spool Makeup: The robust wing nut allows for quick, ultra-secure connections and disconnections between welded pipe spools in the field, optimizing operational efficiency.

• Economical Solution: Provides a cost-effective, durable connection for non-critical, low-pressure utility and water lines requiring permanent welded integration.

Specifications & Technical Details

Applications

This 3" Figure 100 butt weld hammer union is an essential component for reliable, low-pressure fluid systems where permanent pipework is desired. Typical applications include the fabrication of large-bore rig utility lines, standard water and air transfer networks, bulk storage tank tie-ins, welded pump suction routing, and general industrial fluid transfer where rapid break-out capability and dependable 1,000 PSI containment are required on permanent spools.

Quality Assurance

Each hammer union assembly undergoes rigorous quality control protocols, including precision dimensional verification of the weld bevels, strict tolerance checks on the seating surfaces, and full material traceability (MTRs), ensuring complete structural integrity, safe pressure containment, and reliable field performance.

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